diff --git a/bsl/csl/interfaces/pin.h b/bsl/csl/interfaces/pin.h
index 3c538ad..f2b83d5 100644
--- a/bsl/csl/interfaces/pin.h
+++ b/bsl/csl/interfaces/pin.h
@@ -92,6 +92,9 @@ typedef struct
 typedef enum 
 {
 	notValidMode,
+	UnvalidAlternate,
+	OutOfRangeAlternate,
+	NotValidSpeed, 
 	notValidOut,
 	OutOfRange,
 	NotDeclared, 
@@ -99,7 +102,6 @@ typedef enum
 	NoPullUpDown, 
 	NotAnalog, 
 	NotDigital, 
-	TooFast, 
 	Bocked, 
 	AlreadyUsed,
 	NotGpio
@@ -178,7 +180,7 @@ void pinHardwareInfo(pinNo_t pinNo);
 * @brief  Handles the given error and stops all further execution.
 * Dependeing on the platfonr an the form of information printing.
 */
-void pinThrowError(); 	
+void pinThrowError(pinErrors_t error); 	
 
 #ifdef __cplusplus
 }
diff --git a/bsl/csl/interfaces/timer.h b/bsl/csl/interfaces/timer.h
index 362e021..fb49498 100644
--- a/bsl/csl/interfaces/timer.h
+++ b/bsl/csl/interfaces/timer.h
@@ -1,4 +1,22 @@
+#include "hardwareDescription.h"
 
+typedef enum {
+	functionNotSupported,
+	prescalerOutOfRange
+} timerError_t;
+
+typedef enum {
+	upCounting,
+	downCounting,
+	centerAligned
+} timerCountDirection_t;
+
+typedef enum {
+	inputCapture,
+	outputCompare,
+	pwm,
+	onePulse
+} timerMode_t;
 
 void timerActivateBus(timerNo_t timer); 
 void timerEnableTimer(timerNo_t timer); 
@@ -12,7 +30,16 @@ void timerClearCounter(timerNo_t timer);
 
 
 /* Second stage configuration */
-void setTimerHz(timerNo_t timer, uint16_t hz); 
-void setTimerMs(timerNo_t timer, uint16_t ms); 
-void setTimerNs(timerNo_t timer, uint16_t ns); 
-void setTimerPs(timerNo_t timer, uint16_t ps); 
+void timerSetHz(timerNo_t timer, uint16_t hz); 
+void timerSetMs(timerNo_t timer, uint16_t ms); 
+void timerSetNs(timerNo_t timer, uint16_t ns); 
+void timerSetPs(timerNo_t timer, uint16_t ps); 
+
+void timerSart(timerNo_t timer);
+void timerStop(timerNo_t timer);
+uint32_t timerGetCount(timerNo_t timer);
+
+void timerThrowError(timerError_t error); 
+
+
+
diff --git a/bsl/csl/stm32f042/Device/hardwareDescription.h b/bsl/csl/stm32f042/Device/hardwareDescription.h
index d12a011..949d110 100644
--- a/bsl/csl/stm32f042/Device/hardwareDescription.h
+++ b/bsl/csl/stm32f042/Device/hardwareDescription.h
@@ -11,7 +11,7 @@
 #define MAX_SPI_CHANNEL_COUNT 2
 #define MAX_I2S_CHANNEL_COUNT 2
 #define MAX_CAN_CHANNEL_COUNT 1
-
+#define MAX_TIMER_CHANNEL_COUNT 6
 
 #define MAX_N_PORTS_COUNT	3
 #define MAX_PORT_PINS_COUNT	16
@@ -21,6 +21,10 @@
 #define MAX_PORT_B_PIN_NO	15
 #define MAX_PORT_F_PIN_NO	1
 
+
+
+
+
 typedef enum 
 {
 //  NAME  = BASE ADDR   | PORT | PIN NO
@@ -54,7 +58,10 @@ typedef enum
 	pinF1 =  0x20 | 1	/*!< Port: F Pin: 1  ->  Port F Mask | Pin Mask */
 }pinNo_t;    
              
-static const  uint32_t portBase_Addr_List[3] = {GPIOA_BASE, GPIOB_BASE, GPIOF_BASE};
+static const  uint32_t portBase_Addr_List[MAX_N_PORTS_COUNT] = {
+	GPIOA_BASE, 
+	GPIOB_BASE, 
+	GPIOF_BASE};
              
 static const uint8_t altFunc_List[MAX_N_PORTS_COUNT][MAX_PORT_PINS_COUNT] = {
 	{	// PORT A
@@ -112,3 +119,28 @@ static const uint8_t altFunc_List[MAX_N_PORTS_COUNT][MAX_PORT_PINS_COUNT] = {
 		0b00000000	//N.A
 	}	
 };
+
+// Timers
+
+typedef enum {
+	timer_1,
+	timer_2,
+	timer_3,
+	timer_14,
+	timer_16,
+	timer_17	 	
+} timerNo_t;
+
+typedef enum {
+	hb, 
+	hsi
+}clkSources_t;
+
+static const uint32_t timerBase_Addr_List[MAX_TIMER_CHANNEL_COUNT] = {
+	TIM1_BASE, 
+	TIM2_BASE, 
+	TIM3_BASE, 
+	TIM14_BASE, 
+	TIM16_BASE, 
+	TIM17_BASE
+};
diff --git a/bsl/csl/stm32f042/Src/CMakeLists.txt b/bsl/csl/stm32f042/Src/CMakeLists.txt
index e325d80..b8d9059 100644
--- a/bsl/csl/stm32f042/Src/CMakeLists.txt
+++ b/bsl/csl/stm32f042/Src/CMakeLists.txt
@@ -23,3 +23,9 @@ target_compile_definitions(stmInit PRIVATE ${C_DEFS})
 target_include_directories(stmInit PUBLIC ${INTERFACES_DIR} ${CSL_INCLUDES})
 add_library(sub::init ALIAS stmInit)
 
+add_library(stmTimer timer.c)
+target_compile_options(stmTimer PRIVATE ${C_FLAGS})
+target_compile_definitions(stmTimer PRIVATE ${C_DEFS})
+target_include_directories(stmTimer PUBLIC ${INTERFACES_DIR} ${CSL_INCLUDES})
+add_library(sub::timer ALIAS stmTimer)
+
diff --git a/bsl/csl/stm32f042/Src/pin.c b/bsl/csl/stm32f042/Src/pin.c
index 96ea668..35b29a3 100644
--- a/bsl/csl/stm32f042/Src/pin.c
+++ b/bsl/csl/stm32f042/Src/pin.c
@@ -21,8 +21,6 @@
 */
 
 #include "pin.h"
-#include "utils_assert.h"
-
 
 #define MODER_IN		0x0UL	
 #define MODER_OUT		0x1UL		
@@ -123,9 +121,15 @@ void pinSetSpeed(pinNo_t pinNo, pinSpeed_t speed)
  
 void pinSetAlternate(pinNo_t pinNo, uint16_t alternate)
 {
-	assert(altFunc_List[PIN_PORT][PIN_NO] & (1<<(7-alternate)));
-	assert(alternate < 16);
-	
+	if(!(altFunc_List[PIN_PORT][PIN_NO] & (1<<(7-alternate))))	
+	{
+		pinThrowError(UnvalidAlternate);	
+	}
+	if(alternate > 15)
+	{
+		pinThrowError(OutOfRangeAlternate);	
+	}
+
 	if(PIN_NO < 8) {
 		PIN_BASE->AFR[0] &= ~(0x0F << (PIN_NO * 4));
 		PIN_BASE->AFR[0] |= ((alternate & 0x0F) << (PIN_NO * 4));
@@ -197,9 +201,9 @@ void pinHardwareInfo(pinNo_t pinNo)
 	//TODO : define where to print anh woh to print	
 }
 
-void pinThrowError()
+void pinThrowError(pinErrors_t error)
 {
-	//TODO : Define what for an error di we whant to implement	
+	while(1);
 }
  	
 
diff --git a/bsl/csl/stm32f042/Src/timer.c b/bsl/csl/stm32f042/Src/timer.c
new file mode 100644
index 0000000..34308e9
--- /dev/null
+++ b/bsl/csl/stm32f042/Src/timer.c
@@ -0,0 +1,93 @@
+#include "timer.h"
+
+static const uint32_
+
+void timerActivateBus(timerNo_t timer)
+{
+		
+}
+ 
+void timerEnableTimer(timerNo_t timer)
+{
+	
+}
+ 
+void timerSetClkSource(timerNo_t timer, clkSources_t clk)
+{
+	
+}
+ 
+void timerSetMode(timerNo_t timer, timerMode_t mode)
+{
+	
+}
+ 
+void timerSetCountDirection(timerNo_t timer, timerCountDirection_t direction)
+{
+	
+}
+ 
+void timerSetPrescaler(timerNo_t timer, uint32_t prescaler)
+{
+	
+}
+ 
+void timerSetPostscaler(timerNo_t timer, uint32_t postscaler)
+{
+	
+}
+ 
+void timerSetAutoReload(timerNo_t timer, uint32_t reload)
+{
+	
+}
+ 
+void timerClearCounter(timerNo_t timer)
+{
+	
+}
+ 
+
+/* Second stage configuration */
+void timerSetHz(timerNo_t timer, uint16_t hz)
+{
+	
+}
+ 
+void timerSetMs(timerNo_t timer, uint16_t ms)
+{
+	
+}
+ 
+void timerSetNs(timerNo_t timer, uint16_t ns)
+{
+	
+}
+ 
+void timerSetPs(timerNo_t timer, uint16_t ps)
+{
+	
+}
+ 
+
+void timerSart(timerNo_t timer)
+{
+	
+}
+
+void timerStop(timerNo_t timer)
+{
+	
+}
+
+uint32_t timerGetCount(timerNo_t timer)
+{
+	
+}
+
+
+void timerThrowError(timerError_t error)
+{
+	
+}
+ 
diff --git a/bsl/nucleo_f042k6/bslConfig.cmake b/bsl/nucleo_f042k6/bslConfig.cmake
index f6f2c60..0c7695e 100644
--- a/bsl/nucleo_f042k6/bslConfig.cmake
+++ b/bsl/nucleo_f042k6/bslConfig.cmake
@@ -77,4 +77,4 @@ list(APPEND EXTRA_LIBS sub::delay)
 list(APPEND EXTRA_LIBS sub::pin) 
 list(APPEND EXTRA_LIBS sub::usart)
 list(APPEND EXTRA_LIBS sub::init)
-list(APPEND EXTRA_LIBS sub::assert)
+list(APPEND EXTRA_LIBS sub::timer)
diff --git a/main.cpp b/main.cpp
index 4c4622d..dcd74ba 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,3 +1,6 @@
+#warning "Generated from: " __FILE__
+
+
 #include "main.hpp"
 #include "delay.h"
 #include "deviceSetup.h"
@@ -8,11 +11,8 @@ int main(int argc, char *argv[])
 {
 	uint8_t i = 0; 
 	uint8_t a = '0';
-	
 
 	delayInitMs(8000000, 1000); 
-//	FreeRTOS_Delay dly;
-//	dly.wait(); 
 	
 	pinConfig(pinB3, output, pushPull, def_res, def_speed);
 	pinConfig(pinA0, input, def_stage, pullDown, def_speed);	
@@ -52,30 +52,7 @@ int main(int argc, char *argv[])
 		} else if(a == '0'){
 			pinWrite(pinB3,0);
 		}
-/*
-		if(a == '1' && latch != latch_old)
-		{
-			pinToggle(pinB3);
-			//pinWrite(pinB3,1);
-		}
-		else 
-		{
-			pinWrite(pinB3,0);
-		}	
-		*/
-
-
-		//test if the gpio port works as an input
-/*
-		if(pinRead(pinA0) && !latch_old)
-		{
-			pinWrite(pinB3,1);
-		}
-		else 
-		{
-			pinWrite(pinB3,0);
-		}
-		*/
+		
 		delayMs(100); 
 	}
 	return 1;